When a player is injured I believe they should be allowed to communicate using their radio instead of only their phone. It RP'ly makes no sense to be unable to talk on the radio, but being fully able to grab your phone from your pocket, unlock it and call emergency services for help.
As of now, once you're injured you cannot use your radio. So let's say you are riding your motorycle, miss your turn and crash into a pole and are scriptly downed, it is against the rules to communicate a single word using the radio, but it is totally fine to call 911 for medical assistance. I struggle to see the realism being enforced within this rule. How does someone who's injured succeed in making a phone call, but fail to hold a single button on their radio (which is an ear-piece in most cases).
The only logical reasoning I see behind this new rule is to avoid NonRP situations. E.g when you've been shot in a shootout and you immediately start yelling on the radio. But if that's really the only reason I believe the rulebreaker should just be reported on the forums instead of not allowing any player to utilize their radio when injured.
This is not a kind of rule that promotes better roleplay from the players. This is a rule purely put in place to avoid a possible rule-break of NonRP, which in my opinion is the wrong approach.